Process of sterilizing foods or organic compounds.



I To all whom it may PATENT OFFICE.

CARL CHRISTIAN LEOPOLD GETHER BUDDE, OF COPENHAGEN, DENMARK.

PROCESS OF STERILIZING-FOODS OR ORGANIC COMPOUNfi S.

Application filed June 22,

concern: Be it known that I, CARI. C. L. G. Br one, a subject of the King of Denmark, residing at Copenhagen, Denmark, have invented certain new and useful Improvements in Processes of sterilizing Foods or Organic Compounds, of which the followingisa full, clear, and exact description.

. In sterilizing perishable goods it desirable to avoid intense heating.

is often Milk, for

instance, can only hear slight heating if it is to retain its valuable qualities. An addition of a preservative cannot, in most cases, be employed and especially not when the perishable goods are to be used as food, because 'the- )reservative might be dangerous to healt It is true, as seen for instance from the U. S. A. Patent No. 779637, that sterilization may be effected by means of hydric peroxid under such conditions, that the substances finally become free-of h dric peroxid. heating to about -55 3. cannot be avoided here, and it is sometimes desirable to avoid even this slight heating. The presentinvention consists in adding a substance, possessing bactericidal ualities and easy to neutralize by means 0 hydric pe'ro'xid. I-Iydroxylamin and hydrazin are excellently adapted for this purpose. umerous experiments have .hown, that hydroxylamin, even in a much diluted condition, is transformed into nitrogen and water by means of hydric peroxid according to the following formula:

- annpn 211,0, N, 4H,O.

A surplus of hydric peroxid must be added, this surplus, however, is decomposed by the organic substance present. Hydrazin may also be used for this purpose.

As is well known, the combined bactericide effect 0i two antiseptics ously is \far greater than the sum of the individual effect of the two substances. By using the present method the following advanta es are obtained:

1. hat only very small amounts of both antiseptics are needed, in order to .produce a ,very high degree of bactericide effect.

2. That the temperature may be chosen at If he duration of the process is no fac- Specification of Letters Patent.

\ sensitive to a raising After stirring acting simultane- 1906. SerialNo. 322.864.

to be sterilized are very of the temperature, the l process may be carried out at ordinary temerature; if, however, the "process is to be orced asmuch as possible, and if the qualities of the goods to be sterilized are not much influenced by heat, the temperature may be raised accordingly.

3. That the sterilized goods after the proc ess is terminated and, though the above named advantages have been obtained, are still free of foreign substances, as both added tor or if the goods antiseptics have been completely neutralized.

In order to sterilize-for example--m1lk according to this method, about 0.07 to 0.08% liydroxylamin is added to the milk. or shaking, about 0.025% hydric peroxid is added. has been standing for some hours at ordinary temperature, the milk is free of hydroxylamin and hydric peroxid, If milk capable of keeping for an. unlimited time is to be produced according to this method, heating for example to 5()'--55 C. must subsequently be used, as the enzymes will not be disturbed by the process and they would gradually cause a slow spontaneous decomposition andtransforination of the substances of the milk,"if their activity is not disturbed by subsequently heating.- It is obvious, that this heating need to last very short time only.

With suitable modification, the method may1 be used for most kinds of perishable 00 s. 2 Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1'. The process of sterilizin organic substances, by first mixing the su stance with a nitrogen compound having the' chemical properties of hvdroxylamin, and then adding hydric peroxi 2. The process stances, by first mixing the substance with hydrazin and then adding hydric peroxid.

In witness whereof, I subscribe my signature, in-the presence-of two witnes'ss.

Patented Jan. 28; 1908.

After the milk 

